Latch for elevator-doors.



G. M; PEELLE. LATGH FOR ELEVATOR DOORS. APPLICATION FILED JULYG, 1910.

Patented July 16, 1912.

UaZeZ CALEB M. PEELLE, 0F BROOKLYN, NEW YORK, ASSIGNOR TO THE PEELLE 00., OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

LATCH FOR ELEVATOR-DOORS.

Specification of Letters Patent.

Patented. July 16, 1912.

To all whom it may concern.

Be it known that I, CALEB M. PEELLE, a citizen of the United States, and resident of Brooklyn, in the county of Kings and State. of New York, have invented certain new and useful Improvements in Latches for Elevator-Doors, of which the following is a specification.

The invention relates to improvements in latches for elevator-doors, and is particularly designed for use in connection with self-closing fireproof doors, severzilly arranged in two parts or sections and supported for vertical movement from and toward.

each other for opening and closing a doorway leading to an elevator-shaft; and the object of the invention is to provide a latch adapted to engage the door for holding it open when the car is suitably positioned, and to release the same for its automatic closing when the car is shifted from such position; and a further object comprehends independent means including a fusible-linl connection actuated by an adjacent fire or extreme heat for releasing the latch to permit the door to close if casually left open.

In describing'the invention in detail reference is had to the accompanying drawing, forming a part of this specification, and wherein like characters of reference are used to designatelike parts throughout the several views, and in which;

Figure 1 is a front elevation of an elevator-doorway, having upper and lower door sections suitably connected together and provided with the improved latch embodied in the present invention; Fig. 2, a transverse section of the doorway, shown in relation with the latch; Fig. 3, an enlarged ground plan of the latch, with the adjacent .parts shown partially in. section; and Fig.

1 is an enlarged side view of the latch.

Numerals 1 and. 2 designate respectively the adjacent portions of the upper and lower sections of a two-part fire-proof elevatordoor, to the lower section of which is se cured a carrier-bar 3, connected at its opposite ends to the flexible bands or chains which lead over the carr1er-wheels 5 and are secured to the upper door-section. The wheels are mounted upon guide-rails 6, which are fixed to the wall of the elevatorshaft and provided with interior angles 7 for slidingly receiving the guidobleeks 8, secured to the door-sections, which as thus mounted are adapted for vertical movement from and toward each other for opening and closing a doorway 9. leading to the elevatorshaft, the upper door-section being more heavily constructed to have an overbalancing effect upon the lower section to cause a I self-closing action of the door when opened. lVithin the elevator-shaft is movably'supported a car of ordinary construction, indicated by the fragmental portion of an upright 10 and a platform 11, to the latter of which is fixed a double cam, having the raised faces 12 and the depressed part 13.

Upon one of the guide-rails 6 is fi'xed an angle'frame 14, carrying a pin '15 for pivotally supporting a latch-lever, on the upper mm of which is formed a hook 16 and an actuating-lug 17. The latch lever is provided with a lower actuating-arm 1S, adapted to he engaged by a bolt 19, slidably mounted in guides 20, fixed upon the angle frame 14. Also fixed to the frame is a spring 21 which tends to outwardly urge or project the hook end of the latch for engagementwith the carrier-bar 3, secured to the lower door-section 2. To the upper end of the bolt 19 is fixed an eye-bolt 22, to which is connected the upper end ofa ten sion-spring 23, the lower end of the latter being secured to a bracket 24, fixed to the angle frame. Also to the upper end of the bolt 19 is secured one end of wire 25, the opposite end of which passes through a per foration 26 in the guide-rail and is secured to a fusible-link27, fixed to the lintel 28 of v the doorway, exterior of the elevator-shaft. The fusible-link is of ordinary construction and by means of the connection-wire is normally adapted to retain the bolt in its upper position against the action of the tension-spring 23 and out 'of engagement with the latch-lever.

During the disengagement of the bolt, as shown, the latch is free to be actuated by the movement of the car through the cam- 0 faces 12, fixed to the floor thereof, and when the latter is suitably positioned, on the level with the sill of the doorway, as shown, the recess 13 of the cam will be in line with the actuating-lug 17 of the latch-lever, in which position the hook portion 16 of the lever is normally projected fff the spring 21 and. is adapted to engage the carrier-bar 3 of the lower door-section when the latter is manually depressed for opening the door. Upon l1l the cam engages the actuating-lug for thedisengagement of the hook from the carrierbar to permit the door to close by,gravity.

As thus arranged, it will be obvious that an elevator-door cannot be conveniently opened or remain open unless the car is suit-V a ly positioned in relation thereto, and furthermore, if casually left open in such position, the latch will be independently actuated in case of an adjacent fire or extreme heat to close the door by the melting of the fusible-link 27 and the release of the springactuated bolt 19.

What I claim as my invention and desire to secure by Letters Patent, is:

1 The combination with an elevator-shaft having a doorway leading thereto, of aselfclosing door for said doorway, a sprin projected latch normally adapted {to normally retain said door in open position, an elevator-car, means for retracting said latch by the movement of said elevator-car, and

- latch-retracting means including a fusible- Copies of this patent may be obtained for link connect-ion adapted to operate independently of saidcar.

2. The combmatlon with an elevathr-shaft having a doorway leading thereto, of a 1nan-' ually-opened self-closing door for said doorway, a latch mounted and normally held for engagement thereby, an elevator-car, a double cam secured to said car for engagement with said latch, said cam having double raised working faces and an intermediate depression, wherebyv the door is held in open position when the car is alined with respect thereto, and automatically closes when the car is moved from such position, and means including a fusible-link for releasing said latch and operating nde-.

adjacent said door o aa a earner-bar, a latch-lever pivotally'mbunt-g I ed adjacent said carrier-bar and having an upper arm provided with a hook and anactu- 'atlng-lug, and an oppositely-disposed lower actuating-arm, a sprlng normally urging the; hook of said upper arm mto engagement with said carrier-bar, an elevator-car, a cam mounted on the car for engagement with the actuating-lug, a. spring-actuated bolt slidably mounted for engagement with the actuating-arm of'said latch-levena fusible link secured adjacent saiddoorway, and a connection between said fusibie-link and bolt adapted to hold the latter outof-engagement" with the actuating-arm oithe latch-lever against the action of its spring,

4. The combination with an elevator-shaft having a doorway leading thereto, o f-a self-.

closing vertically slidable' door for said doorway, an elevator-car, spring-actuated latch mechanism for holding the door in open po sition while the car is atrest at that floor a of the building, means on the car torelease said latch mechanism and allow the door to close when the car leaveslthe floor in eitherdirection,and'latclPretracting means including a fusible link connection adapted-to release the door independently of the can;

Signed at New York city in the State of New York this 29th day of June Ad). 1910.

CALEB .M, PEELLE.

Witnesses: I

WM. F. REGAN, O. LEON KmsnLBAoH.

five cents each, by addressing the (iommissioner of Patents, Washington, D. G. 

